import axios from 'axios'
import { Message } from 'element-ui'
import { resetRouter } from '@/router'
import store from '@/store'
import { getToken, removeToken } from '@/utils/auth'
import { isEmptyString } from '@/utils/index'

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 10000 // request timeout
})

// request interceptor
service.interceptors.request.use(
  config => {
    // do something before request is sent

    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      config.headers['Authorization'] = getToken()
    }
    return config
  },
  error => {
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
  */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    if (response.headers && response.headers['content-type'] && response.headers['content-type'].indexOf('application/json') >= 0) {
      const res = response.data
      // if the custom code is not 0, it is judged as an error.
      if (res.code !== '0') {
        return Promise.reject(new Error(res.msg || 'Error'))
      } else {
        return res
      }
    } else {
      return response
    }
  },
  error => {
    console.log('err' + error) // for debug
    if (error.response && error.response.data) {
      if (!isEmptyString(error.response.data.error_description)) {
        // 登录信息已失效, 需要重新登录
        Message({
          message: '登录信息已失效, 需要重新登录',
          type: 'error',
          duration: 5 * 1000
        })
        return new Promise(resolve => {
          removeToken()
          resetRouter()
          store.state.tagsView.visitedViews = []
          resolve()
        })
      } else if (!isEmptyString(error.response.data.msg)) {
        return Promise.reject(error.response.data.msg)
      } else {
        return Promise.reject(error.response.data)
      }
    } else {
      return Promise.reject(error)
    }
  }
)

export default service
